Dr. Srinivasan Beddhu, a professor of medicine at the University of Utah, led a study to see whether standing, walking or jogging in lieu of sitting was best at extending lifespans. It was found that a low-intensity activity like standing, by itself, had little effect on mortality risk. But those who walked around after standing, replacing some of their sitting time with a light-intensity activity like strolling, gained a substantial benefit in terms of mortality risk. In fact, if they replaced as little as two minutes of sitting each hour with gentle walking, they lowered their risk of premature death by about 33 percent, compared with people who sat almost nonstop. The researchers found an additional reduction in mortality risk if people engaged in moderate exercise instead of sitting. The benefits seem to be additive. Someone who already is walking for two minutes per hour and now starts to walk two minutes more — displacing an additional two minutes of what had been sitting time — could reduce his or her risk of premature death even more than from walking two minutes alone. This reduction in death risk is likely related to energy balance, Dr. Beddhu said. Strolling instead of sitting increases the number of calories that someone burns, potentially contributing to weight loss and other metabolic changes, which then affect mortality risk. The benefits of strolling more often around the office seem alluring and the risks slight, especially if you invite your boss to join you, highlighting your tender care for his or her well-being.
-as reported in the NY Times May 2015